89442638 has 4 divisors (see below), whose sum is σ = 134163960. Its totient is φ = 44721318.

The previous prime is 89442631. The next prime is 89442659. The reversal of 89442638 is 83624498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83624498 = 2 ⋅41812249.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89442631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22360658 + ... + 22360661.

It is an arithmetic number, because the mean of its divisors is an integer number (33540990).

Almost surely, 2^89442638 is an apocalyptic number.

89442638 is a deficient number, since it is larger than the sum of its proper divisors (44721322).

89442638 is a wasteful number, since it uses less digits than its factorization.

89442638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44721321.

The product of its digits is 331776, while the sum is 44.

The square root of 89442638 is about 9457.4118023908. The cubic root of 89442638 is about 447.2134603333.

The spelling of 89442638 in words is "eighty-nine million, four hundred forty-two thousand, six hundred thirty-eight".